How to use IronScrollTargetBehavior with ES6?

[kokoron]

_scrollHandler() is not work.
How I get scroll offset?

<link rel="import" href="../../../bower_components/iron-scroll-target-behavior/iron-scroll-target-behavior.html">
class ContainerView extends Polymer.Element {
            static get is() { return 'container-view'; }
            static get properties() {
                return {
                };
            }
            static get behaviors() { return [Polymer.IronScrollTargetBehavior]; }
            _scrollHandler() {
                console.log(this._scrollTop()); // <= not work
            }
        }

[lukawski]

Importing this behavior is not enough. You have to include it into your class declaration.

Change this line

class ContainerView extends Polymer.Element {

into

class ContainerView extends Polymer.mixinBehaviors([
		Polymer.IronScrollTargetBehavior
], Polymer.Element) {

Also, this line this._scrollTop() should be changed into this._scrollTop. Since _scrollTop property is a getter, not a regular method, you can't invoke it.
Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/get